US4020015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
•
Filing: 1975-11-14
•
Granted: 1977-04-26
•
Expires: 1995-11-14
Abstract
Abstract The invention provides a process by which certain soil-release agents are given enhanced activity in detergent compositions by incorporating them in the composition in granules of a carrier, particularly an organic extrudable solid, throughout which the soil-release agent is uniformly dispersed.
Inventors
- 👤 Geoffrey Bevan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3715; C11D11/00; C11D11/0082; C11D3/0005; C11D3/0036; C11D3/20; C11D3/22; C11D3/222; C11D3/225; C11D3/3719
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
In an improved built laundry detergent composition in powder form including a soil-release agent selected from the group consisting of: a. a copolymer, in the range of 1:2 to 1:10, of polyoxyethylene glycol and polyethylene terephthalate; b. a condensation product of (i) polyoxyethylene glycol, (ii) adipic acid and (iii) caprolactam or hexamethylene diamine or its salts of caprolactam or hexamethylene diamine with adipic acid; or c. a cellulose containing an ether-linked, unsubstituted C 1 to C 4 alkyl group and an ether-linked substituent based on a C 2 to C 4 hydroxy alkyl group in which the total number of substituent groups per glucose unit of the cellulose is between 1.5 to 3.0, wherein the improvement comprises the incorporation into said detergent composition of said soil release agents in the form of granules, said granules consisting essentially of about 5 to about 70% by weight of said agent dispersed throughout a solid, water soluble, detergent compatible carrier, said carrier being a material other than said soil-release agents.
Claim 2
Dependent Claim
167 words
In an improved built laundry detergent composition in powder form including a soil-release agent selected from the group consisting of: a. a copolymer, in the range of 1:2 to 1:10, of polyoxyethylene glycol and polyethylene terephthalate; b. a condensation product of (i) polyoxyethylene glycol, (ii) adipic acid and (iii) caprolactam or hexamethylene diamine or its salts of caprolactam or hexamethylene diamine with adipic acid; or c. a cellulose containing an ether-linked, unsubstituted C 1 to C 4 alkyl group and an ether-linked substituent based on a C 2 to C 4 hydroxy alkyl group in which the total number of substituent groups per glucose unit of the cellulose is between 1.5 to 3.0, wherein the improvement comprises the incorporation into said detergent composition of said soil release agents in the form of granules, said granules consisting essentially of about 5 to about 70% by weight of said agent dispersed throughout a solid, water soluble, detergent compatible carrier, said carrier being a material other than said soil-release agents.
Claim 3
Dependent Claim
32 words
A composition as defined in claim 1 wherein said carrier is an organic solid which is extrudable under conditions of temperature and pressure which will not cause degradation of said soil-release agents.
Claim 4
Dependent Claim
142 words
Granules, suitable for inclusion in a laundry detergent formulation, consisting essentially of a solid, water soluble, detergent compatible carrier having dispersed therein about 5 to about 70% by weight of a soil-release agent selected from the group consisting of: a. a copolymer, in the range of 1:2 to 1:10, of polyoxyethylene glycol and polyethylene terephthalate; b. a condensation product of (i) polyoxyethylene glycol (ii) adipic acid and (iii) caprolactam or hexamethylene diamine or its salts of caprolactam or hexamethylene diamine with adipic acid; or c. a cellulose containing an ether-linked, unsubstituted C 1 or C 4 alkyl group and an ether-linked substitutent based on a C 2 to C 4 hydroxy alkyl group in which the total number of substituent groups per glucose unit of the cellulose is between 1.5 and 3.0, said carrier being a material other than said soil-release agent.
Claim 5
Dependent Claim
142 words
Granules, suitable for inclusion in a laundry detergent formulation, consisting essentially of a solid, water soluble, detergent compatible carrier having dispersed therein about 5 to about 70% by weight of a soil-release agent selected from the group consisting of: a. a copolymer, in the range of 1:2 to 1:10, of polyoxyethylene glycol and polyethylene terephthalate; b. a condensation product of (i) polyoxyethylene glycol (ii) adipic acid and (iii) caprolactam or hexamethylene diamine or its salts of caprolactam or hexamethylene diamine with adipic acid; or c. a cellulose containing an ether-linked, unsubstituted C 1 or C 4 alkyl group and an ether-linked substitutent based on a C 2 to C 4 hydroxy alkyl group in which the total number of substituent groups per glucose unit of the cellulose is between 1.5 and 3.0, said carrier being a material other than said soil-release agent.
References Cited (Backward Citations)
US3144412A
Cited
GB1088984A
Cited
GB1124271A
Cited
GB1154730A
Cited
GB1204123A
Cited
US3668000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |